I was posting about a brake vacuum problem over in the 80 thread but figured Might get some traction here.
Does anyone with a 1hdt and gear driven vacuum pump know how fast the vacuum is supposed to build? Mine appears to be slow and I don't know why.
I have rebuilt the vacuum pump, new aisin master,.new soft lines and now a new Bosch brake booster. It still seems to build vacuum slowly but I can find a baseline rate anywhere online.
Here is the other thread with videos
Does anyone with a 1hdt and gear driven vacuum pump know how fast the vacuum is supposed to build? Mine appears to be slow and I don't know why.
I have rebuilt the vacuum pump, new aisin master,.new soft lines and now a new Bosch brake booster. It still seems to build vacuum slowly but I can find a baseline rate anywhere online.
Here is the other thread with videos
Need Help Diagnosing FZJ80 Brake Issue
I have been reading a few other threads but nothing seems to be very definitive so I would like some opinions on whether I am going after the right thing. Truck: 1993 FZJ80 with a 1HDT swapped, engine and tranny are at 200,000km, everything else is at around 700,000km's. Was daily driven but...
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